A lot of nicer bindings come with foam type stuff on the bottom of the binding. It mostly works, but there is always marks. I don't think you will find anything that will keep the board pristine, only stuff that will minimize it.
Now if you are more worried about damage and not cosmetics, not having foam, etc has never damaged any of my boards. Usually it is trees, rails, rocks, people, and stuff like that do the most damage.
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